Pipe-threading device.



PATENTED NOV. 8, 1904.

W. H. MORGAN.

PIPE THREADING'DEVIGE.

APPLICATION FILED MAY 11, 1904.

no MODEL.

Inventor, W

Witnesses I Httomegs Patented November 8, 1904.

PATENT trips.

WILLIAM HENRY MORGAN, OF SENECA, ILLINOIS.

PlPE-THREADING DEVICE.

SPECIFICATION forming part of Letters Patent No. 774,597, dated. November 8, 1904.

Application filed May 11, 1904. Serial No. 207.464=. (N0 model.)

To all whom, it ntcty concern:

Be it known that I, WILLIAM HENRY MOR- GAN, a citizen of the United States, residing at Seneca, in the county of Lasalle and State of Illinois, have invented a new and useful Pipe- Threading Device, of which the following is a specification.

This invention relates to metal-working tools, and has for its object to provide an improved device of this character for facilitating the cutting of threads upon pipes,.and especially upon very short lengths of pipes.

It is furthermore designedto accommodate the device to hand-operated thread-cutting stocks of different sizes, to rigidly support the work during the operation of the device, and to maintain the thread-cutting stock in proper relation with respect to the work.

With these and other objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size, and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure 1 is a sectional elevation of a thread-cutting device embodying the features of the present invention. Fig. 2

is a detail sectional perspective view of thework-holding socket. Fig. 3 is a detail sectional elevation illustrating the device employed in the production of a stud-bolt. I

Like characters of reference designate corresponding parts in each and every figure of the drawings. 7 a

For the support of the present device there has been shown an ordinary work-bench 1, having a pipe-vise 2 thereon and including the usual clamping-screw 3. Supported by the pipe-vise .2 is a guide rod or bar 4, having one end portion circular in form and the opposite end non-circular, with either end capable of engagement with the vise, according to the character of work to be performed by the device. Upon the guide rod or bar is a cylindrical socket member 5, one end of which is open and increased in thickness, so as to receive the screw-threads of the threaded openings 6, wherein are fitted radial set-screws 7. The opposite end of the socket is closed by an integral head 8, through the center of which is provided a. non-circular opening 9 to receive the non-circular portion of the guiderod and prevent rotation of the socket thereon, while at the same time permitting of a slidable movement of the socket to apply and remove the same and to adjust the socket to any position upon the guide-rod. It will of course be understood that the guide-rod 4 is of a length to project at opposite ends of the socket 5 in order that one end may be connected with the pipe-vise and the other end may constitute a support for any ordinary or preferred form of thread-cutting device. After the guide-bar and the work-receiving socket have been assembled and supported in the vise the pipe to be threaded, which has been illustrated at 10, is slipped over the outer end of the guide-rod and fitted into the open outer end of the work-receiving socket, the set-screws 7 being set against the pipe to hold the same against endwise and rotary movement. Any ordinary hand-operated threadcutting tool 11 is then fitted upon the outer end portion of the guide-rod 4, with its stationary tubular supporting member 12 fixed against rotation by means of a set-screw 13. carried thereby and engaging the guide-rod. The body of the tool carries an internallyscrew-threaded sleeve 14:, which embraces the eXternally-screw-threaded portion of the sta tionary member 12, so that when the bits or dies of the tool have been set to fit the pipe 10 and the member 12 clamped upon the guide-rod 4 threads may be out upon the pipe by rotating the tool or stock 11 in the usual manner. After the work has been completed the thread-cutting stock may be readily removed by releasing the set-screw 13, and the pipe may be releasedby loosening the setscrews 7 From the foregoing description it is apparent that the guide-bar and work-receiving socket of the present invention enables the employment of thread-cutting stocks or tools 1 of different sizes, and if it is desired tosever a pipe a pipe-cutting tool may be substituted entirely in front of the work and the workl these elements from 1 i new, and

holder and approaches the front thereof, wherefore very short lengths of pipe may be conveniently threaded.

The device may also be used for removing short nipples from couplings, valves, unions, and the like by inserting the nipples within the Work-holder, setting the screws 7 against the nipple, and then rotating the coupling, Valve, or union by means of a pipe-wrench,

main in the work-holder, from which it may be removed after releasing the set-screws l without any in ury whatsoever to the threads of the nipple. In using the device for this pur- 3 for clamping the work to the holder, the op so as to have the squared end thereof prol l the work-holder, one projected end portion l of the bar being formed for connection with l a support, and the opposite projected end porpose the supporting rod or bar 4 is reversed,

jected in front of the bench-vise sutliciently only for the support of the work-holder-5, for the reason that should the bar project a considerable distance in front of the work-holder it would prevent valves and the like from being engaged with the work-holder.

By removing the device from the vise bench and' reversing the position of the supporting-bar 4, so as to have the same projected at the rear only of the work-holder,

the latter may be titted to a nut by having the set-screws 7 set against opposite edges of the nut, and then by applying a wrench to the bar the nut may be removed or applied in a very convenient manner, where it might not be possible to have access to the out by means of an ordinary wrench.

As illustrated in Fig. 3 of the drawings, the present device may be employed in the formation of stud-bolts or bolts which are threaded at opposite end. In this use of the device the supporting-bar L is projected entirely at the rear of the work-holder and held. in a bench-vise, as hereinbefore described, while the intermediate unthreaded portion of a studbolt 15 is gripped between the set-screws 7, wherefore any common or preferred form of die-stock or screw-threading tool 16 may be fitted to the projected end of the work to screw-thread the same, after which the position of the work may be reversed, so as to give access to the opposite end thereof for threading the same. lit will here be noted that the set-screws 7 engage the intermediate fit 1 or thread-cutting tools, so as not to interfere i unthreaded portion of the bolt, and therefore no damage results to the screw-threads when the position of the work has been reversed.

The purpose of having the combined guiding and supporting bar cylindrical for a l greater portion of its length and non-circular at one end is to prevent rotation of the workl holder when fitted to the non-circular portion, j while the cylindrical portion isdesigned to within the circular openings of die-stocks with the convenient rotation thereof.

Havingthus described the construction and operation of my invention, what I claim as desire to secure by Letters Patent,

being formed for connection with a support,

= and the opposite end being formed for the whereby the nipple will be unscrewed and rcl the work-holder.

support of a tool in cooperative relation with 2. A device of the class described including centrically thereon and provided with means posite ends of the bar beingprojected beyond tion being formed for the support of a tool in cooperative relation with the work-holder.

3. A device of the class described including a work-holder having a non-circular opening, and a bar having one end portion cylindrical cular to fit the opening of the work-holder l l l l in shape and its opposite end portion non-cirand capable of being reversed to project the bar at either end of said holder.

L. A device of the class described including a bar having a non-circular portion, and a hollow work-holder having a non-circular opening receiving the non-circular portion of the guide-bar and provided with means for clamping the work within the holder, the guide-bar being projected at opposite ends of support and for supporting a cutting-tool upon the opposite end of the bar.

5. A device of the class described including a bar having a non-circular portion, and a work-holding socket slidable upon the bar with one end provided with a non-circular opening receiving the non-circular portion of the bar and also provided with set-screws piercing the socket to clamp the work therein, the guide-bar being projected at opposite ends of the work-holder for connection at one end with a supportand for supporting the i l l the holder for connection at one end with a l cutting-tool at its opposite end.

6. A device of the class described including 1. A device of the class described including l a guide-bar and a work-holder carried therei by with the guide-bar projected at opposite ends of the work-holder, one end of the bar a work-holder having set-screws piercing the In testimony that I claim the foregoing as same and provided With a non-circular openmy own I have hereto aflixed my signature in ing in its otherwise closed rear end, and a l the presence of two witnesses. supporting-bar having a non-circular portion WILLIAM HENRY MORGAN. to lit the non-circular opening of the Work- Witnesses:

holder and capable of being reversed to pro- WILLIAM LETTSOME,

ject at either end of the work-holder. l CHAS. H. SMITH. 

